.challenge-hero { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr); align-items: center; gap: 48px; padding: 64px 0 44px; }
.challenge-hero h1 { margin: 0; font-size: clamp(44px, 6.6vw, 92px); line-height: .94; letter-spacing: -.065em; }
.challenge-hero h1 span { color: var(--teal); }
.challenge-hero .portal-lede { max-width: 650px; margin-bottom: 0; }
.challenge-ticket { display: grid; gap: 14px; padding: 30px; border: 2px solid var(--ink); border-radius: 16px; background: var(--lime); box-shadow: 7px 7px 0 var(--ink); transform: rotate(2deg); }
.challenge-ticket strong { font-size: 76px; line-height: 1; letter-spacing: -.06em; }
.challenge-ticket span { font: 750 12px/1.5 var(--mono); }
.challenge-ticket p { margin: 0; border-top: 2px solid var(--ink); padding-top: 14px; font-size: 14px; }
.challenge-main { overflow-wrap: anywhere; }
#challengeStage { max-width: 940px; margin: 0 auto 72px; scroll-margin-top: 100px; }
.challenge-intro, .challenge-question, .challenge-results { padding: clamp(22px, 4vw, 42px); border: 2px solid var(--ink); border-radius: 16px; background: var(--paper-raised); box-shadow: 6px 6px 0 var(--ink); }
.challenge-intro h2, .challenge-question h2, .challenge-results h2 { margin: 0 0 24px; font-size: clamp(24px, 3vw, 36px); line-height: 1.2; letter-spacing: -.04em; }
.challenge-intro ul { padding-left: 20px; margin-bottom: 26px; }
.challenge-intro li { margin-block: 10px; }
.challenge-meter { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin: 20px 0; font: 750 12px var(--mono); }
.challenge-meter progress { flex-basis: 100%; width: 100%; height: 14px; accent-color: var(--teal); }
.challenge-category { margin: 0 0 8px; color: var(--teal); font: 800 11px/1.6 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.challenge-course { margin: 0 0 24px; color: var(--muted); font-size: 14px; }
.challenge-answers { display: grid; gap: 12px; }
.challenge-answer { display: grid; grid-template-columns: 32px minmax(0, 1fr); align-items: start; gap: 12px; padding: 16px; border: 2px solid var(--ink); border-radius: 10px; background: var(--paper); color: var(--ink); text-align: left; cursor: pointer; }
.challenge-answer:not(:disabled):hover { background: var(--paper-muted); box-shadow: 3px 3px 0 var(--ink); }
.challenge-letter { display: grid; place-items: center; width: 30px; height: 30px; border: 1.5px solid var(--ink); border-radius: 6px; font: 800 12px var(--mono); }
.challenge-answer:disabled { cursor: default; opacity: 1; }
.challenge-answer.is-correct { background: var(--lime); }
.challenge-answer.is-wrong { background: #ffc4b7; }
.challenge-answer-state { grid-column: 2; font: 800 11px/1.5 var(--mono); }
.challenge-answer-state:empty { display: none; }
.challenge-feedback:empty { display: none; }
.challenge-feedback { margin-top: 24px; padding: 20px; border-left: 4px solid var(--teal); background: var(--paper); }
.challenge-feedback p { margin: 8px 0 0; }
.challenge-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 24px; }
.challenge-actions [hidden] { display: none; }
.challenge-skip { min-height: 44px; padding: 8px 0; border: 0; background: none; color: var(--muted); text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.challenge-footnote { color: var(--muted); font-size: 12px; margin-top: 24px; }
.challenge-score { display: grid; gap: 8px; margin-bottom: 28px; }
.challenge-score strong { font-size: clamp(64px, 9vw, 104px); line-height: 1; letter-spacing: -.07em; color: var(--teal); }
.challenge-score > span { font: 750 12px/1.6 var(--mono); }
.challenge-results h3 { margin: 36px 0 16px; font-size: 24px; letter-spacing: -.04em; }
.challenge-breakdown { display: grid; gap: 18px; padding: 0; list-style: none; }
.challenge-breakdown li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; font-size: 14px; }
.challenge-bar { grid-column: 1 / -1; height: 10px; border: 1px solid var(--ink); border-radius: 4px; overflow: hidden; background: var(--paper-muted); }
.challenge-bar > span { display: block; height: 100%; background: var(--teal); }
.challenge-review { display: grid; gap: 12px; }
.challenge-review details { padding: 18px; border: 2px solid var(--ink); border-radius: 10px; }
.challenge-review summary { cursor: pointer; font-weight: 800; }
.challenge-review summary > span { display: inline-block; margin-left: 8px; padding: 2px 6px; background: var(--paper-muted); font: 750 10px/1.5 var(--mono); }
.challenge-review a { display: inline-block; min-height: 44px; font-weight: 800; text-underline-offset: 4px; }
.challenge-main button:disabled { cursor: default; }
@media (max-width: 760px) {
  .challenge-hero { grid-template-columns: 1fr; gap: 26px; padding-top: 38px; }
  .challenge-hero h1 { font-size: clamp(38px, 8.8vw, 64px); }
  .challenge-ticket { grid-template-columns: auto minmax(0, 1fr); align-items: center; padding: 22px; transform: none; }
  .challenge-ticket strong { font-size: 54px; }
  .challenge-ticket p { grid-column: 1 / -1; }
  .challenge-answer { padding: 12px; gap: 10px; }
}
@media (max-width: 520px) { #challengeStage { scroll-margin-top: 132px; } }